JPS55120396A - Control device for synchronous motor - Google Patents

Control device for synchronous motor

Info

Publication number
JPS55120396A
JPS55120396A JP2612479A JP2612479A JPS55120396A JP S55120396 A JPS55120396 A JP S55120396A JP 2612479 A JP2612479 A JP 2612479A JP 2612479 A JP2612479 A JP 2612479A JP S55120396 A JPS55120396 A JP S55120396A
Authority
JP
Japan
Prior art keywords
speed
output
synchronous motor
circuit
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2612479A
Other languages
Japanese (ja)
Other versions
JPS6122558B2 (en
Inventor
Yoshio Naito
Kazuyoshi Ejima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2612479A priority Critical patent/JPS55120396A/en
Publication of JPS55120396A publication Critical patent/JPS55120396A/en
Publication of JPS6122558B2 publication Critical patent/JPS6122558B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To make it possible to continue operation of a synchronous motor with safety without commutation failure at the start of deceleration of the motor by driving the synchronous motor by a current type inverter device of the forced commutation system. CONSTITUTION:When a synchronous motor 5 is decelerated by lowering the speed reference signal which is the output of a deceleration reference circuit 10, the speed feedback signal output of a speed detector circuit 18 becomes larger than the speed reference signal and the polarity of the output signal of a speed control circuit 11 changes. A beta switching circuit 16 detects the change of polarity of the output signal of the speed control circuit 11 and produces an output signal which changes in steps, but it is converted into a signal which changes for predetermined time by a primary time-lag circuit 21. By a 1b phase control circuit 24, the phase of the output current of an inverter 4 is changed, for example, from beta=0 deg. to beta=150 deg. for a predetermined time. Consequently, there is no decrease in the commutation condenser voltage of the inverter 4 so that the deceleration of the motor can be accomplished with safety.
JP2612479A 1979-03-08 1979-03-08 Control device for synchronous motor Granted JPS55120396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2612479A JPS55120396A (en) 1979-03-08 1979-03-08 Control device for synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2612479A JPS55120396A (en) 1979-03-08 1979-03-08 Control device for synchronous motor

Publications (2)

Publication Number Publication Date
JPS55120396A true JPS55120396A (en) 1980-09-16
JPS6122558B2 JPS6122558B2 (en) 1986-06-02

Family

ID=12184808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2612479A Granted JPS55120396A (en) 1979-03-08 1979-03-08 Control device for synchronous motor

Country Status (1)

Country Link
JP (1) JPS55120396A (en)

Also Published As

Publication number Publication date
JPS6122558B2 (en) 1986-06-02

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